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  • Options for transparent data encryption on SQL 2005 and 2008 DBs.

    - by Dan
    Recently, in Massachusetts a law was passed (rather silently) that data containing personally identifiable information, must be encrypted. PII is defined by the state, as containing the residents first and last name, in combination with either, A. SSN B. drivers license or ID card # C. Debit or CC # Due to the nature of the software we make, all of our clients use SQL as the backend. Typically servers will be running SQl2005 Standard or above, sometimes SQL 2008. Almost all client machines use SQL2005 Express. We use replication between client and server. Unfortunately, to get TDE you need to have SQL Enterprise on each machine, which is absolutely not an option. I'm looking for recommendations of products that will encrypt a DB. Right now, I'm not interested in whole disk encryption at all.

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  • Request Coalescing in Nginx

    - by Marcel Jackwerth
    I have an image resize server sitting behind an nginx server. On a cold cache two clients requesting the same file could trigger two resize jobs. client-01.net GET /resize.do/avatar-1234567890/300x200.png client-02.net GET /resize.do/avatar-1234567890/300x200.png It would be great if only one of the requests could go through to the backend in this situation (while the other client is set 'on-hold'). In Varnish there seems to be such a feature, called Request Coalescing. However that seems to be a Varnish-specific term. Is there something similar for Nginx?

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  • Using nginx and/or varnish to cache server-generated 301 redirects

    - by rlotun
    I'm implementing a sort of url-shortener service. What happens is that I have some backend app server that takes in a request, does some computation and returns a 301 redirected url back upstream to an nginx frontend: request ---> nginx ----> app_server What I want to be able to do is cache this returned 301 url for the same request (a specific url with a "short code"). Does nginx do this caching automatically? Or should I drop in something like varnish in between nginx and the app_server? I can easily cache this in memcache, but that would require hitting the app_server, which I'm sure can be dispensed with after the first request. Thanks.

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  • Out Of Memory Error - Magento

    - by robobobobo
    Ok normally I understand when my server is giving me out of memory errors, but this one has me stumped! I'm running a magento based site, with one or two plugins in it and the rest is pretty basic. The site runs and loads fine wiht no issues. However in the backend - Configuration - Payment Methods it gives me the following out of memory error Fatal error: Out of memory (allocated 39059456) (tried to allocate 85 bytes) in ########/Varien/Simplexml/Element.php on line 84 Now this is where I'm confused..it's allocated more than it tried to allocate? Am I correct there? So how is it running out of memory? My server has 6Gb ram, an SSD and 2 CPU's running WHM with a few other low traffic sites on it. I set my php memory limit to 100mb, 1000mb and finally unlimited but all to no avail! I'm completely lost here, would really appreciate some expertise on this Cheers

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  • Puzzled about PHP file permission and shared webhosting - what are some explanations?

    - by extrakun
    I have this issue with different web-hosting, particular upload scripts which can only upload to a folder only if it has 777 permission (which is risky). On the test server (on a different webhost), 755 works well. On another web-hosting, log files generated by PHP file functions cannot be write to some time, but other files are mysteriously unaffected (for instance, the log files for the entire week is 655, and they work well, but just today's log-file doesn't work unless it is set to 777). I am more of an application developer than a server backend expert, so these behaviours puzzle me to no end. Why are they happening? What can be done?

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  • how to resolve all externally unresolved DNS queries ?

    - by red eyes dev
    I am using PowerDns on a Linux box (Debian 6). I would like to set up the powerdns server to resolve all externally unresolved DNS queries to a given, internal host. Is this possible? How is it done? I think it's necessary to use pdns-recursor, but my configuration file doesn't works ! I use mysql for backend. I add manually google.com and it's works, but if I delete entry I have "server failed", root dns (or isp dns) don't answer me.

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  • nginx automatic failover load balancing

    - by robinmag
    Hi, I'm using nginx and NginxHttpUpstreamModule for loadbalancing. My config is very simple: upstream lb { server 127.0.0.1:8081; server 127.0.0.1:8082; } server { listen 89; server_name localhost; location / { proxy_pass http://lb; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } } But with this config, when one of 2 backend server is down, nginx still routes request to it and it results in timeout half of the time :( Is there any solution to make nginx to automatically route the request to another server when it detects a downed server. Thank you.

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  • V4L2 and ALSA: Kernel SPI or User API?

    - by pnongrata
    I'm trying to understand what Video for linux and ALSA are (exactly), and I can't discern whether they're APIs for Linux application to use (the userspace) or if they are backend services that are only available to the Linux kernel (sort of a kernalspace SPI). Or, if they are something entirely different. On one hand, those articles make it sound like its an API for applications to use. However, on the V4L2 page it has a section title Software supporting Video4Linux... So is V4L2 a library that applications use, or is it a module that "snaps into" the kernel? I'm so coonfused, thanks in advance.

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  • Symfony sfControlPanel 500 error only when executing 'tasks'

    - by rrlange
    As a bit of background, I recently had to restore a Symfony site from backup. Ever since the 'successful' restore, I am running into an exception when trying to execute a(ny) task via the web-based sfControlPanel: Unable to find PHP executable stack trace * at sfToolkit::getPhpCli() in SF_ROOT_DIR/plugins/sfControlPanelPlugin/modules/sfControlPanel/actions/actions.class.php line 93 FYI: symfony version 1.0.6 PHP 5.2.6 (cli) (built: May 2 2008 16:06:40) Apache/2.2.3 CentOS 5.* Thank you very much for any and all suggestions as to what might be amiss. Addendum: I neglected to mention that I can the frontend app (and certain backend apps) perfectly fine via the web. I am also able to run common tasks via the command line (cc etc.).

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  • zero downtime during database scheme upgrade on SQL 2008

    - by eject
    I have web application on IIS7 with SQL server 2008 as RDBMS. Need get 0 downtime during future upgrades of ASP.NET code and DB schema as well. I need to get right scenario for this. I have 2 web servers and 2 sql servers and one http load balancer whcih allows to switch web backend server for web requests. Main goal is to make 1st web server and DB server up and running, update code and db schema on 2nd server and then switch all the requests to 2nd server and then main problem - how to copy data from 1st database 2nd (which was changed during upgrade).

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  • Virtual hosting in Varnish with individual vcl files for configuration

    - by Michael Sørensen
    I wish to use varnish to put in front of an apache and a tomcat on the same server. Depending on the ip requested, it goes to a different backend. This works. Now for most of the sites the default varnish logic will work just fine. However for some specific sites I wish to use custom VCL code. I can test for host name and include config files for the specific domains, but this only works inside the individual methods recv etc. Is there a way to include a complete set of instructions, in one file, per domain, without having to manage separate files for subdomain_recv, subdomain_fetch etc? And preferably without running seperate instances of varnish. When I try to include a file on the "root level" of default.vcl, I get a compilation error. Best regards, Michael

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  • Create Report in Microsoft Excel - Permissions Issue in Team Foundation Server 2010

    - by sammarcow
    I am trying to use the feature "Create a Report in Microsoft Excel" for Visual Studio TFS 2010. I am being prompted for a username and password in Excel for any given Team Project when right clicking the item "Active Tasks", selecting "Create a Report in Microsoft Excel," found in the following path within the Team Explorer pane, from Visual Studio 2010: 'Collection Name' | 'Project Name' | Work Items | Iteration 1 | Active Tasks I am a Team Project Administrator and Collection Administrator. I checked The SharePoint site: http :// 'serverName'/Reports/Pages/Folder.aspx and have full sitewide and project permissions on this site. I loaded SQL Server Management Studio on the machine running the instance of TFS (and also the SQL backend for TFS) and ensured that I had roles "serveradmin" and "sysadmin". How do I run this report? Specifically, what permissions are required?

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  • Setup a automatic server reboot on when a particular service fails

    - by user1179459
    I am running linux based server (centos 6.0) with cpanle and WHM, I have critical website running with a chat server which uses a openfire as the chat server backend server, i have monitored last few weeks this service crashes quite often, i have no way of knowing that, and i have to wait till the next day to restart the server. (and this can only be fixed by using server reboot as its got to do with some java memory problem) is there a way i can setup a monitoring service to the server and if this service goes down server itself will reboot ? is this something possible or is there a better way to overcome this problem ?

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  • Using slapcat to backup LDAP

    - by rsw
    I'm running an OpenLDAP directory on a Debian server, using the hdb backend. I've been wondering about backups, and did som reading on the net. Slapcat seems to be the way to go, but I keep seeing these posts speaking about it being dangerous to use it while slapd is running. In what way is this dangerous? I'm planning to run these backups during the night, and no writing will be done to the database during the night - reads will probably occur though. If there's any other backup solution better suited for this, I'd gladly hear about it.

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  • Passenger 'premature end of script headers' error

    - by fatnic
    Hi. I really need help debugging an error I'm getting with Passenger on Apache. I've just made a fresh install of Ubuntu 10.4 and have Apache, Ruby and Passenger installed. I'm trying to run a simple rack app but keep getting this error in my Apache error.log [Tue Sep 28 05:54:41 2010] [error] [client 86.171.2.82] Premature end of script headers: The error then continues with The backend application (process 25574) did not send a valid HTTP response; instead, it sent nothing at all. It is possible that it has crashed; please check whether there are crashing bugs in this application. *** Exception NoMethodError in PhusionPassenger::Rack::ApplicationSpawner (undefined method `call' for nil:NilClass) (process 25574): I've tried older versions of passenger also but get the same error. Ubuntu 10.4 Apache 2.2.14 Ruby 1.9.2-p0 Passenger 2.2.15

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  • Reverse Proxy (mod_rewrite) and Rails (absolute paths)

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action mod_proxy_html seems like the right idea, but it doesn't seem to be as dynamic as I would need, since the rules need to be hard coded into the config files. Is there a way to fix this server-side, so that the links will be routed correctly?

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  • Expression web ftp: Stuck at "Listing subsites"

    - by FrankPython
    When I try to use the Expression Web 4 built-in ftp I see the message ""Listing subsites in.." and soon afterward "passive ftp not available". If I switch to active, I get "active ftp not available". There are no subsites. It is a simple directory with one html page. Backend is a normal IIS6 server. FTP to the same IP with other FTP clients works fine! Any idea if Expression web has some specific requirements? It is our own dedicated server. (Please no tips to use another tool, for this specific project Expression Web is a requirement).

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  • Amazon EC2 Web server in Load Balancer gives 503

    - by dale
    we've been running our web servers at Amazon with load balancer and auto-scaling for over a year with no problem. All of a sudden today the request began to get aborted with the error: 503 ... Backend server is at capacity The web servers are at 1% CPU and no other alarms trigger. We use Amazons load balancer and nginx. Lots of requests like this are showing up in the access_log. 10.246.114.93 - - [05/Jun/2014:20:16:09 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:09 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:09 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:09 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:10 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:10 +0000] "-" 400 0 "-" "-" 10.246.114.93 - - [05/Jun/2014:20:16:10 +0000] "-" 400 0 "-" "-" 10.229.15.214 - - [05/Jun/2014:20:16:10 +0000] "-" 400 0 "-" "-" 10.229.15.214 - - [05/Jun/2014:20:16:10 +0000] "-" 400 0 "-" "-" Any thoughts?

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  • What software can I use to create a video of following type?

    - by Bond
    Here is a video on this link http://www.youtube.com/watch?v=kSx873lOgIc&feature=player_embedded#at=62 Someone among my bosses wants to create some thing similar to the video on above link and has asked me what software can they use to do the same.The purpose is to create educational content only.Which can have the demonstrations (animations ) and audio also running in backend. I am not clear as what software can be used for this on Linux or Windows. I have users which use Windows and Linux both. I have used video editing on Mac using Final Cut Pro but the video on the above link is not some thing which can be achieved with FCP.(Or may be I am not aware) I am looking solution for 1) Linux users 2) Windows users In case of Linux it is Ubuntu for some users and Fedora for some others. I am a Linux guy so I am specifically posting this question in terms of Ubuntu but I also need suggestions for Windows type of users.I have no clue of such video animations at all.

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  • Django - Moving database from development to production servers

    - by Garfonzo
    I am working on a Django project with a MySQL backend. I'm curious about the best way to update a production server's database to reflect the changes made on the development server's database? When I develop now, I make some changes to a models.py file, then to a schemamigration using South. Sometimes I do several migrations across several apps within the main project folder before it's ready for the production database. This means that there are several migration files in the app/migrations/ folder created by South. So on the production server, how does one update the database to reflect all the changes made in development, without having any data loss?

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  • does wordpress auto update work without a cron job?

    - by perler
    I'm a bit on a loss here. Since WP 3.7 you can update your wordpress automatically. Since then it's more hit and miss on several servers here. I would like to understand, if it is enough to enable automatic updates described here and how this would work without a cron job. I'm under the impression right now, that the upgrade is only started, when ever someone logs into the backend, is this correct? If so, is there a way to automate the updates via a cron job?

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  • nginx errors: upstream timed out (110: Connection timed out)

    - by Sparsh Gupta
    Hi, I have a nginx server with 5 backend servers. We serve around 400-500 requests/second. I have started getting a large number of Upstream Timed out errors (110: Connection timed out) Error string in error.log looks like 2011/01/10 21:59:46 [error] 1153#0: *1699246778 upstream timed out (110: Connection timed out) while reading response header from upstream, client: {IP}, server: {domain}, request: "GET {URL} HTTP/1.1", upstream: "http://{backend_server}:80/{url}", host: "{domain}", referrer: "{referrer}" Any suggestions how to debug such errors. I am unable to find a munin plugin to keep a check on number of upstream errors. Sometime the number of errors per day is way too high and somedays its a more decent 3 digit number. A munin graph would probably help us finding out any pattern or correlation with anything else How can we make the number of such error as ZERO

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  • MySql sevice stops under 2008 r2 x64

    - by volody
    I have installed MySql 5.5 server under windows 2008r2 x64 Apparently I can see that it stops even if is configured to start automatically What can I do to find out why this is happening? MySql database is used as backend of ASP.Net web site Is it possible that web site was not active for a while and system stop mysql service? Update: It was mysql-5.5.7-rc-winx64. I could an issue with this version. Now I am trying to install mysql-5.5.8-winx64 And I have an issue with configuring MySql to work using name pipes I did uncheck use of TCP/IP protocol and configuration wizard just hangs

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  • How to set up Nginx as a caching reverse proxy?

    - by Continuation
    I heard recently that Nginx has added caching to its reverse proxy feature. I looked around but couldn't find much info about it. I want to set up Nginx as a caching reverse proxy in front of Apache/Django: to have Nginx proxy requests for some (but not all) dynamic pages to Apache, then cache the generated pages and serve subsequent requests for those pages from cache. Ideally I'd want to invalidate cache in 2 ways: Set an expiration date on the cached item To explicitly invalidate the cached item. E.g. if my Django backend has updated certain data, I'd want to tell Nginx to invalidate the cache of the affected pages Is it possible to set Nginx to do that? How?

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  • reverse_proxy (mod_rewrite) and rails

    - by SooDesuNe
    I have front end rails app, that reverse proxies to any of a number of backend rails apps depending on URL, for example http://www.my_host.com/app_one reverse proxies to http://www.remote_host_running_app_one.com such that a URL like http://www.my_host.com/app_one/users will display the contents of http://www.remote_host_running_app_one.com/users I have a large, and ever expanding number of backends, so they can not be explicitly listed anywhere other than a database. This is no problem for mod_rewrite using a prg:/ rewrite map reverse proxy. The question is, the urls returned by rails helpers have the form /controller/action making them absolute to the root. This is a problem for the page served by mod_rewrite because links on the proxied page appear as absolute to the domain. i.e.: http://www.my_host.com/app_one/controller/action has links that end up looking like /controller/action/ when they need to look like /app_one/controller/action Is there a way to fix this server-side, so that the links will be routed correctly?

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